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Finding the Fourth Proportional to 71,901.80, 107,852.70 and 47,018.60

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Solution

The fourth proportional to 71,901.80, 107,852.70 and 47,018.60 is: 70,527.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,901.80 : 107,852.70 = 47,018.60 : x
  2. Step 2: Convert to fraction form
    71,901.80/107,852.70 = 47,018.60/x
  3. Step 3: Cross multiply
    71,901.80x = 107,852.70 × 47,018.60
  4. Step 4: Simplify right side
    71,901.80x = 5,071,082,960.22
  5. Step 5: Solve for x
    x = 5,071,082,960.22/71,901.80
  6. Step 6: Final answer
    x = 70,527.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.